Tenderly
Transaction simulation, debugging, monitoring and Node RPC platform for EVM developers.
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Tenderly key facts
| Category | Developer infrastructure |
|---|---|
| Chains | EVM networks |
| Platforms | Web, API, SDK |
| Free plan | Free plan available; excludes Node RPC |
| Pricing | Node RPC on paid plans, metered in Tenderly Units (1 to 400 TU per request) |
| Chains | 100+ networks |
What is Tenderly?
Tenderly is a developer platform for simulating, debugging and monitoring onchain transactions, used by engineering and risk teams. Its docs list support for 100+ networks. Node RPC usage is metered in Tenderly Units, from 1 TU for a read call to 400 TU for a full simulation.
How Tenderly works
Tenderly runs transactions against a copy of live chain state before anything is broadcast.
The Simulation API and the tenderly_simulateTransaction RPC method return a decoded trace, gas usage, asset and balance changes, emitted events and storage diffs. Simulation Bundles chain approvals, transfers and protocol calls so each step runs on the state left by the previous one, which is how teams test governance proposals or multi-step strategies. The simulations docs list 98 supported networks for this feature.
Virtual Environments fork a live network into a private testnet with an unlimited faucet and Admin RPC cheatcodes for balances, storage, block number and time. Each one gets a sync mode at creation: Static stays at the forked block, State Only Sync keeps tracking storage slots you have not written to, and Network Mirror replays the parent chain block by block. The mode cannot be changed later. Built-in bridging covers LayerZero, Chainlink CCIP, Across and CCTP for cross-chain tests.
For production monitoring, Alerts watch addresses and contracts with 12 trigger types, from failed transactions and emitted events to balance, state and view-function changes, and route to email, Slack, Telegram, Discord, PagerDuty or webhooks. Web3 Actions run your own code when a condition fires. The Debugger steps through any EVM transaction line by line with execution trace, stack trace and decoded call data, and Node RPC serves JSON-RPC with full archive data on 75+ networks.
How to start with Tenderly
- You can start without an account: paste a transaction hash, contract or wallet address into Tenderly and you get the explorer view, the Debugger, the Gas Profiler and Fund Flow, one network at a time.
- A free account adds the in-browser simulator, impersonation of any public address, balance and storage overrides, and public contract verification through the dashboard or the Hardhat and Foundry plugins.
- Virtual Environments, Alerts, the Simulation API and Bundles, Web3 Actions and Node RPC sit on the paid platform.
- The docs route each of them through the sales team rather than a self-serve checkout, so plan for a call before you wire Tenderly into CI/CD or a production wallet flow.
- Options listed for organizations include SSO sign-in, role-based access control, private and custom chains, and dedicated deployments inside your own infrastructure.
Tenderly fees and limits
Tenderly's docs do not publish plan prices; capacity and limits are agreed with its sales team. What the docs do publish is how Node RPC is metered in Tenderly Units per request. Reads such as eth_getBalance cost 1 TU, eth_call and eth_estimateGas 4 TU, eth_sendRawTransaction 20 TU, debug and trace calls 40 TU, tenderly_estimateGas 40 TU, and full simulations or traces 400 TU. The docs' worked example: 1,000 reads plus 100 writes comes to 3,000 TU.
Risks to know before using Tenderly
- A simulation is only as current as the state it runs on.
- A Static Virtual Environment freezes at the forked block, so its results drift from mainnet as blocks pass, and the sync mode cannot be switched after creation.
- The free account covers single-transaction simulation in the browser, while alerts and Node RPC need the paid plan, so monitoring you treat as critical depends on a contract negotiated with sales.
Tenderly alternatives
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Where Tenderly ranks on DappAtlas
Listed next to Tenderly
- Dune Analytics tool
- Optimistic Etherscan Block explorer
- PolygonScan Block explorer
- Foundry Smart contract tool
- Hardhat Smart contract tool
- Remix IDE Smart contract tool
Tenderly pros and cons
- Covers 100+ networks per its docs
- Simulation, debugger, alerts and Node RPC in one dashboard
- Node RPC read calls cost 1 TU each
- Free plan does not include Node RPC access
- Node RPC capacity is set through the sales team
- Simulation calls over RPC cost 400 TU each
Tenderly FAQ
What is Tenderly?
Tenderly is a developer platform for simulating, debugging and monitoring onchain transactions, used by engineering and risk teams. Its docs list support for 100+ networks. Node RPC usage is metered in Tenderly Units, from 1 TU for a read call to 400 TU for a full simulation.
Which chains does Tenderly support?
EVM networks.
How much does Tenderly cost?
Node RPC on paid plans, metered in Tenderly Units (1 to 400 TU per request), according to Tenderly’s own page (checked Sep 26, 2026). Free plan: Free plan available; excludes Node RPC.
Sources
How this page works
Sources: Tenderly: official site, Tenderly: Node RPC pricing, Tenderly: Documentation. Data as of Sep 26, 2026.
Not affiliated with any project listed. Educational content, not financial advice.